committed from zkp

pythonkd · pythonkd · commit c490339bf8d7 · 2018-11-16T19:35:57.000+08:00
diff --git a/FluentPython/BingoCage.py b/FluentPython/BingoCage.py
@@ -0,0 +1,22 @@
+import random
+
+
+class BingoCage:
+    def __init__(self, items):
+        self._items = list(items)
+        random.shuffle(self._items)
+
+    def pick(self):
+        try:
+            return self._items.pop()
+        except IndexError:
+            raise LookupError('pick from empty BingoCage')
+
+    def __call__(self):
+        return self.pick()
+
+if __name__ == '__main__':
+    bingo = BingoCage(range(10))
+    callable(bingo)
+    print(bingo(), bingo.pick())
+    
